干旱区生态环境知识资源中心(Arid): Quantifying water stress and temperature effects on camelina (Camelina sativa L.) seed germination

Arid

DOI	10.1016/j.envexpbot.2021.104450
	Quantifying water stress and temperature effects on camelina (Camelina sativa L.) seed germination
	Sanehkoori, Fatemeh Hosseini; Pirdashti, Hemmatollah; Bakhshandeh, Esmaeil
通讯作者	Bakhshandeh, E (corresponding author), Km 9 Farah Abad Rd,POB 578, Sari City 4818166996, Mazandaran Prov, Iran.
来源期刊	ENVIRONMENTAL AND EXPERIMENTAL BOTANY
ISSN	0098-8472
EISSN	1873-7307
出版年	2021
卷号	186
英文摘要	Camelina (Camelina sativa (L.) Crantz; Brassicaceae) is known as an important and low-input oilseed crop, which is widely used in the production of biopolymers, biofuels, cosmetics, food, and feed. One of the main problems of camelina cultivation is related to seed size which can directly influence its germination, seedling growth, and development. Therefore, this study was performed to evaluate the effect of temperature (T) and water potential (psi) on camelina germination behavior using population-based threshold models as the first study in this case. For this purpose, camelina seeds were incubated at eight Ts (5, 10, 15, 20, 25, 30, 35, and 40 degrees C) and at each of the following five levels of psi s (0, -0.25, -0.50, -0.75 and -1 MPa). The results illustrated that T, psi and T x psi significantly affected germination characteristics of camelina. The psi(b)(50) value remained constant at Ts <= 20 degrees C ( 1.29 MPa), afterward increased linearly to 0.81 and 0.41 MPa at 25 and 30 degrees C, respectively. The thermal time model also showed that the psi levels did not affect the value of T-b at sub-optimal Ts (T-b = 1.5 degrees C), while T-c(50) decreased linearly with decreasing psi, with the rate of 11.3 degrees C per MPa at supra-optimal Ts, conforming with the results obtained by the hydrothermal time model. This decrease in germination capacity at Ts above T-o was due to the shifts in the psi(b)(50) (become more positive), reflecting a decrease in GR(50) as a result of thermoinhibition which could be considered as an adaptive strategy under stress conditions. The cardinal Ts for camelina germination at 0 MPa were estimated 1.5 degrees C for T-b, 20.0 degrees C for T-o, and 34.4 degrees C for T-c. Consequently, camelina could be marked as a cold-tolerant plant and suitable for cultivation in arid regions due to the high resistance to low water potential (psi(b)(50) = 1.29 MPa).
英文关键词	Camelina sativa Cardinal temperatures Drought stress Germination Population-based threshold models
类型	Article
语种	英语
收录类别	SCI-E
WOS记录号	WOS:000647808700001
WOS关键词	CARDINAL TEMPERATURES ; HYDROTHERMAL TIME ; CROPPING SYSTEMS ; BASE TEMPERATURE ; THERMAL TIME ; QUANTIFICATION ; POPULATIONS ; HYDROTIME
WOS类目	Plant Sciences ; Environmental Sciences
WOS研究方向	Plant Sciences ; Environmental Sciences & Ecology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/350091
作者单位	[Sanehkoori, Fatemeh Hosseini] Sari Agr Sci & Nat Resources Univ, Dept Agron, Sari, Iran; [Pirdashti, Hemmatollah; Bakhshandeh, Esmaeil] Sari Agr Sci & Nat Resources Univ, Genet & Agr Biotechnol Inst Tabarestan, Sari, Iran
推荐引用方式 GB/T 7714	Sanehkoori, Fatemeh Hosseini,Pirdashti, Hemmatollah,Bakhshandeh, Esmaeil. Quantifying water stress and temperature effects on camelina (Camelina sativa L.) seed germination[J],2021,186.
APA	Sanehkoori, Fatemeh Hosseini,Pirdashti, Hemmatollah,&Bakhshandeh, Esmaeil.(2021).Quantifying water stress and temperature effects on camelina (Camelina sativa L.) seed germination.ENVIRONMENTAL AND EXPERIMENTAL BOTANY,186.
MLA	Sanehkoori, Fatemeh Hosseini,et al."Quantifying water stress and temperature effects on camelina (Camelina sativa L.) seed germination".ENVIRONMENTAL AND EXPERIMENTAL BOTANY 186(2021).